This document discusses key concepts in digital image production including raster images, vector images, anti-aliasing, and resolution. Raster images are made of pixels and can look pixelated when zoomed in, while vector images use mathematical equations to scale smoothly without pixilation. Anti-aliasing minimizes aliasing artifacts by smoothing jagged pixel edges. Resolution refers to the number of pixels per inch, with higher resolution images containing more detail.

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HA1 - Technical File

2. BTec Level 3
Extended Diploma in Creative Media Production
HA1 - Technical File – Raster Images
Raster images or bitmaps are a data structure representing a generally rectangular grid
of pixels or points of colour, viewable via a monitor, paper, or other display medium.
The image on the left is a raster image as it looks
pixelated but when it is looked at from far enough
away it doesn’t look as rectangular or pixelated.
A bitmap corresponds bit-for-bit with an image displayed on a
screen, generally in the same format used for storage in the
display's video memory, or maybe as a device-independent
bitmap.

3. BTec Level 3
Extended Diploma in Creative Media Production
Vector Images
Vector graphics is the use of geometrical primitives such as
points, lines, curves, and shapes or polygon(s), which are all
based on mathematical equations, to represent images in
computer graphics.
One advantage of using vector graphics is that you can
scale them as long as the aspect ratio is maintained
without pixilation becoming a factor. However even though
vector images are so high quality they are not very good
when using realistic images.
Because vector images are such high quality they can only
Be saved in certain formats such as EPS, PDF & PICT.

4. BTec Level 3
Extended Diploma in Creative Media Production
Antialiasing
Anti-aliasing is the technique of minimizing the distortion artefacts known as aliasing
when representing a high-resolution image at a lower resolution. Anti-aliasing is used
in digital photography, computer graphics, digital audio, and many other applications.
The images below are without Antialiasing as the edges are jagged and pixelated
The images below have been rendered with Antialiasing as they have smooth edges.
By Antialiasing the eye has been tricked into thinking this, but if you zoom in like the
Picture on the right you can see that Antialiasing has just neatened the pixelated edges.

5. BTec Level 3
Extended Diploma in Creative Media Production
Resolution
This would be an example as a high resolution as it will
Have more pixels per inch more than the average picture.
This would be an example of a low quality resolution as there
Will not be as many pixels per inch in this image.

6. BTec Level 3
Extended Diploma in Creative Media Production

7. BTec Level 3
Extended Diploma in Creative Media Production

8. BTec Level 3
Extended Diploma in Creative Media Production

9. BTec Level 3
Extended Diploma in Creative Media Production

10. BTec Level 3
Extended Diploma in Creative Media Production

11. BTec Level 3
Extended Diploma in Creative Media Production

12. BTec Level 3
Extended Diploma in Creative Media Production
Bibliography
http://en.wikipedia.org/wiki/Raster_graphics
http://vector-conversions.com/vectorizing/raster_vs_vector.html
http://en.wikipedia.org/wiki/Vector_graphics
http://www.tech-faq.com/vector-images.html
http://en.wikipedia.org/wiki/Spatial_anti-aliasing
http://www.lunaloca.com/tutorials/antialiasing/